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AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
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FCOM 19 AUG 10
HOLD EXIT PROCEDURE
Position (1) If “IMM EXIT” pressed, the aircraft will exit at the next fix overfly.
Position (2) If “IMM EXIT” pressed, the aircraft will make an immediate turn to the fix where the
hold will be exited.
If managed speed is active,
the computer sets the target speed to the applicable speed of the current phase (for
example, speed constraint, ECON speed, or speed limit).
The computer then bases its predictions on the assumption that the flight will continue on
the descent path, if the aircraft is in descent.
If DES mode is engaged,
the following applies :
The holding pattern is never included ‐ in the descent path computation.
‐ The flight crew cannot enter altitude and speed constraints at the hold exit fix. (This is
only allowed at the hold entry fix).
‐ The vertical guidance in the HM, during the descent phase, calls for a constant
-1 000 ft/min. But the computer considers altitude constraints that will take effect farther
down the flight path as it calculates vertical guidance and predictions. The system will not
allow the aircraft to descend below the next altitude constraint, neither the FCU selected
altitude. If the aircraft reaches the next altitude constraint, it will level off and the altitude
constraint mode will engage.
With RESUME HOLD pressed
If the flight crew presses the key next to “RESUME HOLD”, the aircraft remains in the holding
pattern, and “IMM EXIT” is displayed again.
After that, each time the aircraft flies over the holding fix, the system updates the predictions
for one more holding circuit.
HOLDING PATTERN ENTRIES
The FMGS offers three types of entry into holding patterns :
1. Direct entry
2. Teardrop entry
3. Parallel entry
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
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FCOM 19 AUG 10
1. The direct entry
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A318/A319/A320/A321 FLEET DSC-22_20-30-10-15 P 22/42
FCOM 19 AUG 10
2. The teardrop entry
3. The parallel entry
Note: If the leg the aircraft is flying toward the holding fix is on a “limit” between a teardrop
entry and a parallel entry, the FMGC may compute and display either of the two
entries. The pilot should keep this in mind and should not assume that the FMGC is
malfunctioning.
If the flight plan leg toward the hold entry fix is on a course that is the reciprocal of
the inbound course of the holding pattern, the aircraft will fly a parallel entry.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A318/A319/A320/A321 FLEET DSC-22_20-30-10-15 P 23/42
FCOM 19 AUG 10
PROCEDURE TO INSERT A HOLD (HOLD WITH MANUAL TERMINATION)
The HOLD prompt allows the flight crew to enter a hold with manual termination (HM), at the
revised waypoint or at the present position.
The flight crew accesses the HOLD page from a lateral revision at the present position (PPOS) or
at a waypoint.
SELECT lateral revision at present position (PPOS), or an applicable waypoint.
PRESS the HOLD prompt [3L].
CHECK and (if necessary) MODIFY the HOLD data.
CHECK the temporary flight plan and INSERT it, if appropriate.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - LATERAL FUNCTIONS
A318/A319/A320/A321 FLEET DSC-22_20-30-10-15 P 24/42
FCOM 19 AUG 10
PROCEDURE TO DELETE A HOLD (HOLD WITH MANUAL TERMINATION)
CLEAR the HOLD directly in the flight plan, as can be done for a normal waypoint.
OFFSET
Applicable to:
GENERAL
Offset allows the pilot to define a lateral offset to the left or right of the active flight plan. Once
inserted, the offset applies from the present position (PPOS) all along the flight plan to the first
waypoint (WPT) at which a holding pattern is defined, or to the last waypoint before the runway.
In most cases, the pilot will use it enroute because of an ATC clearance, or to avoid bad weather
expected along the flight plan route.
Accessed from lateral revision (LAT REV) at the present position page, an offset may be defined
between 1 and 50 nm in one-nautical-mile steps.
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A320机组操作手册FLIGHT CREW OPERATING MANUAL 1(80)
